Connecting-rod.



A. R. PRIBIL.

CONNECTING ROD.

APPLICATION FILED OCT-31. 1911.

Patented 0ct.22,1918.

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CONNECTING ROD.

APPLICATION FILED 00131. 1911.

1,282,286. Patent-ed Oct. 22, 1918.

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1 I: I"/r r momma/1 tint ALEXIS R. PRTBIL, OF CLEVELAND, OHIO.

CONNECTING-ROD.

Specification of Letters Patent.

Original application filed July 12, 1917, Serial No. 180,053. Dividedand this application filed October 31, 1917. Serial No. 199,427.

To all whom it may concern:

Be it known that I, ALEXIS R. PRIBIL, a citizen of the United States ofAmerica, residing at Cleveland, in the county of Guyahoga and State ofOhio, have invented certain new and useful Improvements inConnecting-Rods, of which the following is a specification, referencebeing had therein to the accompanying drawings.

This application is a division from my application filed July 12, 1917,Serial No. 180,053, disclosing novel connecting rods of which U bolts rstirrup members are important elements. The U bolts or stirrup membersform part of a crank shaft bearing and are adapted for connecting theparts of the bearing so as to brace and stiffen the same, particularlythose parts subjected to stresses and strains which have a tendency tofracture the rod between the crank shaft bearing and the shank of therod.

The present invention relates to connecting rods that can beadvantageously used in connection with a V type of motor or engine; thecrank shaft bearings of said rods being constructed so that they may becompactly disposed on a crank shaft and'held in sets whereby one rodcannot become longitudinally displaced, on the crank shaft of the engineor motor, relatively to the other rod.

, The present invention also includes features referred to in theapplication above identified, also in another pendin application filedDecember 26, 1916, Serial No. 138,955, and the subject matter of thepresent application will be hereinafter more fully considered and thenclaimed.

Reference will now be had to the drawings, whe rein Figure 1 is an endview f a conventional form of V type motor or engine, the same beinggenerally illustrated to show connecting rods in accordance with myinvention;

Fig. 2 is a side elevation of connecting rods;

Fig. 3 is an enlarged side elevation of the crank shaft bearings of therods;

Fig. 4 is a cross sectional view of the same;

Fig. 5 is a bottom plan of the connecting rods, this view as well asthat shown in Fig. 4, having the rods disposed at right angles to eachother, simply for the sake of clearness in illustrating;

Fig. 6 is a side elevation of a portion of a modified rod, and

Fig. 7 is a longitudinal section of the same.

In the drawing, 1 generally denotes a portion f a V-type motor or enginehaving a crank case 2, and a shaft 3 provided with crank portions 4:.Connected to each crank portion of the shaft 8 are connecting rods 5 and6, said rods extending into the cylinders of the engine and beingconnected to the pistons therein so that reciprocation of said pistonswill impart movement to said connecting rods and a rotary movement tothe shaft 3. The connecting rods necessarily assume difierent anglesrelatively to each other during the operation of the engine, and inorder to connect said rods to a single crank portion f the shaft, saidrods are provided with special crank shaft bearings, which have beenillustrated in detail in Figs. 3, 4 and 5.

- Before describing the crank shaft bearings of said rods, it might bewel to mention each rod is made of pressed steel or other material thatmay be easily shaped and formed to add rigidity to a complete rod. Eachrod is formed of tapering channel members disposed back to back andsuitably connected together so as to form a shank, the small end ofwhich terminates in a connection for a piston pin and the large end ofwhich provides a bearing for the rod on the crank portion 4 of the shaft3.

First considering the rod 6, said rod has the shank members thereofformed with semi-cylindrical sleeves 30 connected by a semi-cylindricalbushing 31. A cap is composed of semi-cylindrical sleeves 32 and abushing 33, with the semi-cylindrica1 sleeve 32 provided withstrengthening ribs 34- and two sets of apertured bosses 35. To connectthe cap to the semi-cylindrical sleeve two U bolts 36 are employed andthese U-bolts have band or strap portions that engage thesemicylindrical sleeves 30 with the threaded stems or bolt portions 37extending through the bosses 35 and provided with nuts 38. The U-boltsare at each side of the longitudinal axis of the connecting rods andconstitute very durable means positively holding the cap in engagementwith the fixed position of the crank shaft bearing. The form of rod justdescribed may be constructed without resorting to spot welding, rivetingor any other fastening means than the mechanical parts assembled asshown, although it may be convenient to spot weld here and there simplyto maintain certain parts in position during the assembling of theconnecting rod.

Now considering the rod 5, said rod has the shank members thereofoflset, as at 41 the fixed portions of the bearings by nuts 48. The caps47 are each pressed from steel and have reinforcing ribs 50.

It is therefore apparent that the single connecting rod has spaced crankshaft bearings and to prevent possible spreading action of thesebearings, tie rod members 49 are employed at the sides of said bearings,the tie rod members having the ends thereof mounted on the U-boltsbetween the apertured bosses 46 and the nuts 48, shown in Fig. '3. Thesetie rod members provide clearance for the rod 6 and maintain thebearings in proper relation to the crank shaft bearing of said rod,although the crank portion of the shaft will, to a certain extent, servethis purpose.

By providing a twin connecting rod 5 with a portion that straddles 0rbridges the connecting rod 6, and its bearing it is possible to providecrank shaft bearings for the rod 5 that will have as great a bearlngsurface upon the crank shaft as the bearing of the rod 6, and yetmaintain the rods 5 and 6 in a vertical plane so as to serve angularlydisposed cylinders. This arrangement permits of a plurality ofconnecting rods being compactly assembled upon the crank shaft, or evenany member to be driven by the reciprocable motion of pistons,consequently it is possible to materially reduce the longitudinaldimension of an engine of the V type.

Furthermore, the twin rod permits of independent bushings being used foreach of the bearings in contradistinction to a single bushing whichserve a plurality of bearings.

In Figs. 6 and 7 of the drawings, there is illustrated a portion of aconnecting rod having ribs 51 that reinforce and stifi'en thesemi-cylindrical sleeve at their uncture with the shank .members, and itwill also be noted that the cap is provided with stiffening ribs.

What I claim is 1- 1. A pressed steel connecting rod adapted to straddleanother rod, comprising a shank having offset portions provided withbearings, a channel member in the offset portions of said shank havingbushings in said bearings, caps for said bearings, and means embracingsaid bearings adapted to connect said caps thereto.

2. The combination of a connecting rod having a semi-cylindricalbearing, a cap therefor, another connecting rod having a portionstraddling the semi-cylindrical bearing of the first mentioned rod,semi-cylindrical bearings carried by the straddling portion of said rod,caps for all of said bearings, and U-bolts snugly embracing all of saidsemi-cylindrical bearings and connecting said caps thereto. p

3. A pressed steel connecting rod havlng':

spaced semi-cylindrical crank shaft bearings, caps therefor, andU-bolts' snugly embracing said bearings and extending through said capsfor connecting said caps thereto.

4. A connecting rod having spaced bearings, caps therefor, and tiemembers connecting said caps.

5. A connecting rod having spaced bearings, caps therefor, U-boltsconnecting said caps to said bearings, and tie members connecting theU-bolts of one bearing to the U-bolts of the other bearing.

6. The combination with a connecting rod having a crank shaft bearing,of another connecting rod disposed at an angle thereto and havingoffsetportions straddling the bearing of the first mentioned rod, crankshaft bearings carried by the straddling portion of the last mentionedrod, and tie members connecting said bearings independent of the firstmentioned rod or the bearing thereof. 7

In testimony whereof I affix my signature in the presence of twowitnesses. o

ALEXIS R. PRIBIL.

Witnesses:

M. J. WEEKER, E. D. NYKAMP.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner ot ratents.

Washington, D. C.

